8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
332 lines
8.8 KiB
C
332 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* This program creates syntax.h and syntax.c.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "parser.h"
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struct synclass {
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const char *name;
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const char *comment;
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};
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/* Syntax classes */
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static const struct synclass synclass[] = {
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{ "CWORD", "character is nothing special" },
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{ "CNL", "newline character" },
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{ "CBACK", "a backslash character" },
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{ "CSBACK", "a backslash character in single quotes" },
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{ "CSQUOTE", "single quote" },
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{ "CDQUOTE", "double quote" },
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{ "CENDQUOTE", "a terminating quote" },
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{ "CBQUOTE", "backwards single quote" },
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{ "CVAR", "a dollar sign" },
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{ "CENDVAR", "a '}' character" },
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{ "CLP", "a left paren in arithmetic" },
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{ "CRP", "a right paren in arithmetic" },
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{ "CEOF", "end of file" },
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{ "CCTL", "like CWORD, except it must be escaped" },
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{ "CSPCL", "these terminate a word" },
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{ "CIGN", "character should be ignored" },
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{ NULL, NULL }
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};
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/*
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* Syntax classes for is_ functions. Warning: if you add new classes
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* you may have to change the definition of the is_in_name macro.
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*/
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static const struct synclass is_entry[] = {
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{ "ISDIGIT", "a digit" },
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{ "ISUPPER", "an upper case letter" },
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{ "ISLOWER", "a lower case letter" },
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{ "ISUNDER", "an underscore" },
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{ "ISSPECL", "the name of a special parameter" },
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{ NULL, NULL }
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};
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static const char writer[] = "\
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/*\n\
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* This file was generated by the mksyntax program.\n\
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*/\n\
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\n";
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static FILE *cfile;
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static FILE *hfile;
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static void add_default(void);
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static void finish(void);
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static void init(const char *);
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static void add(const char *, const char *);
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static void output_type_macros(void);
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int
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main(int argc __unused, char **argv __unused)
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{
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int i;
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char buf[80];
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int pos;
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/* Create output files */
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if ((cfile = fopen("syntax.c", "w")) == NULL) {
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perror("syntax.c");
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exit(2);
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}
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if ((hfile = fopen("syntax.h", "w")) == NULL) {
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perror("syntax.h");
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exit(2);
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}
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fputs(writer, hfile);
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fputs(writer, cfile);
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fputs("#include <sys/cdefs.h>\n", hfile);
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fputs("#include <limits.h>\n\n", hfile);
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/* Generate the #define statements in the header file */
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fputs("/* Syntax classes */\n", hfile);
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for (i = 0 ; synclass[i].name ; i++) {
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sprintf(buf, "#define %s %d", synclass[i].name, i);
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fputs(buf, hfile);
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for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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putc('\t', hfile);
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fprintf(hfile, "/* %s */\n", synclass[i].comment);
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}
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putc('\n', hfile);
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fputs("/* Syntax classes for is_ functions */\n", hfile);
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for (i = 0 ; is_entry[i].name ; i++) {
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sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);
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fputs(buf, hfile);
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for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)
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putc('\t', hfile);
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fprintf(hfile, "/* %s */\n", is_entry[i].comment);
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}
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putc('\n', hfile);
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fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile);
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fputs("#define PEOF -SYNBASE\n\n", hfile);
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putc('\n', hfile);
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fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);
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fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);
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fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);
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fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);
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putc('\n', hfile);
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output_type_macros(); /* is_digit, etc. */
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putc('\n', hfile);
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/* Generate the syntax tables. */
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fputs("#include \"parser.h\"\n", cfile);
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fputs("#include \"shell.h\"\n", cfile);
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fputs("#include \"syntax.h\"\n\n", cfile);
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fputs("/* syntax table used when not in quotes */\n", cfile);
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init("basesyntax");
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add_default();
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add("\n", "CNL");
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add("\\", "CBACK");
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add("'", "CSQUOTE");
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add("\"", "CDQUOTE");
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add("`", "CBQUOTE");
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add("$", "CVAR");
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add("}", "CENDVAR");
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add("<>();&| \t", "CSPCL");
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finish();
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fputs("\n/* syntax table used when in double quotes */\n", cfile);
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init("dqsyntax");
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add_default();
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add("\n", "CNL");
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add("\\", "CBACK");
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add("\"", "CENDQUOTE");
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add("`", "CBQUOTE");
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add("$", "CVAR");
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add("}", "CENDVAR");
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/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
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add("!*?[]=~:/-^", "CCTL");
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finish();
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fputs("\n/* syntax table used when in single quotes */\n", cfile);
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init("sqsyntax");
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add_default();
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add("\n", "CNL");
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add("\\", "CSBACK");
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add("'", "CENDQUOTE");
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/* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */
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add("!*?[]=~:/-^", "CCTL");
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finish();
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fputs("\n/* syntax table used when in arithmetic */\n", cfile);
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init("arisyntax");
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add_default();
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add("\n", "CNL");
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add("\\", "CBACK");
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add("`", "CBQUOTE");
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add("\"", "CIGN");
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add("$", "CVAR");
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add("}", "CENDVAR");
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add("(", "CLP");
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add(")", "CRP");
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finish();
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fputs("\n/* character classification table */\n", cfile);
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init("is_type");
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add("0123456789", "ISDIGIT");
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add("abcdefghijklmnopqrstuvwxyz", "ISLOWER");
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add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER");
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add("_", "ISUNDER");
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add("#?$!-*@", "ISSPECL");
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finish();
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exit(0);
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}
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/*
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* Output the header and declaration of a syntax table.
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*/
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static void
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init(const char *name)
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{
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fprintf(hfile, "extern const char %s[];\n", name);
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fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name);
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}
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static void
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add_one(const char *key, const char *type)
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{
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fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type);
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}
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/*
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* Add default values to the syntax table.
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*/
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static void
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add_default(void)
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{
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add_one("PEOF", "CEOF");
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add_one("CTLESC", "CCTL");
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add_one("CTLVAR", "CCTL");
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add_one("CTLENDVAR", "CCTL");
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add_one("CTLBACKQ", "CCTL");
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add_one("CTLBACKQ + CTLQUOTE", "CCTL");
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add_one("CTLARI", "CCTL");
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add_one("CTLENDARI", "CCTL");
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add_one("CTLQUOTEMARK", "CCTL");
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add_one("CTLQUOTEEND", "CCTL");
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}
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/*
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* Output the footer of a syntax table.
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*/
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static void
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finish(void)
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{
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fputs("};\n", cfile);
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}
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/*
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* Add entries to the syntax table.
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*/
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static void
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add(const char *p, const char *type)
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{
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for (; *p; ++p) {
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char c = *p;
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switch (c) {
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case '\t': c = 't'; break;
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case '\n': c = 'n'; break;
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case '\'': c = '\''; break;
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case '\\': c = '\\'; break;
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default:
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fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type);
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continue;
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}
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fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type);
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}
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}
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/*
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* Output character classification macros (e.g. is_digit). If digits are
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* contiguous, we can test for them quickly.
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*/
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static const char *macro[] = {
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"#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)",
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"#define is_eof(c)\t((c) == PEOF)",
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"#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))",
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"#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))",
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"#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))",
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"#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))",
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"#define digit_val(c)\t((c) - '0')",
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NULL
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};
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static void
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output_type_macros(void)
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{
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const char **pp;
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for (pp = macro ; *pp ; pp++)
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fprintf(hfile, "%s\n", *pp);
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}
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